Remove/install SCR frame module control unit - AR14.40-P-2020OGE

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ENGINE 642 in MODEL 212, 218, 221 with CODE U42 (BlueTEC diesel exhaust treatment (SCR))

ENGINE 642, 651 in MODEL 212, 218 with CODE U77 (Diesel Emission control BLUETEC (SCR))

MODIFICATION NOTES

5.12.14

AdBlue® tank

MODEL 212 with ENGINE 642, 651 with CODE U77

BF14.40-P-1001-01A

Shown on model 212

Fig 1: SCR Frame Module Control Unit Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Risk of burn injuries and scalding when working at AdBlue lines and the components attached to them. Risk of injury to skin and eyes when handling AdBlue. Risk of poisoning caused by swallowing AdBlue	Pour AdBlue into suitable containers only. Wait until the pressure is released before starting any work on the exhaust aftertreatment system.	AS14.40-Z-0001-01A
	Notes on use, material properties and handling of AdBlue®		AH14.40-N-0001-01AB
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Switch off ignition and remove transmitter key
2	Expose AdBlue® control unit (N118/5) in trunk	For this purpose lift trunk floor covering and remove vehicle tool foam piece.
3	Disconnect electrical connection (5) at AdBlue® control unit (N118/5)	For this purpose undo locking clamp (4).
4	Remove screw/bolts (6) or unscrew nuts
5	Slide AdBlue® control unit (N118/5) out of locking clips (7) in direction of arrow and remove
6	Install in the reverse order
7	Fill AdBlue® container	After installing the new AdBlue® control unit (N1185).
			AR14.40-P-2014-02GZB
	NOx reducing agent AUS 32 ("ADBlue") for SCR systems		NOx reducing agent AUS 32 ("ADBlue") for SCR systems. See https://bevo.mercedes-benz.com/index.php?language_id=1
		Ensure utmost cleanliness. Attach rear apron protector and cover AdBlue® container over a large area around the filler neck with a number of layers of absorbent paper. Dirt can get into the interior coverings otherwise.
		ENGINE 642 in MODEL 212 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) ENGINE 642 in MODEL 218 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) ENGINE 642 in MODEL 221 with CODE U42 (BlueTEC diesel exhaust treatment (SCR)) ENGINE 651 in MODEL 218 with CODE U77 (Diesel Emission control BLUETEC (SCR)) ENGINE 651.925 in MODEL 212.006 with CODE U77 (Diesel Emission control BLUETEC (SCR)) Fender and rear apron protectors BLUTEC AdBlue filling pumps/devices	*BF14.40-P-1001-01A
8	Write fill level of AdBlue® container using diagnostic system in AdBlue® control unit (N118/5) and read off fault memory	After replacing the AdBlue® control unit (N118/5)
			AD00.00-P-2000-04A

FILLING CAPACITY FOR BLUETEC DIESEL EXHAUST TREATMENT (SCR)

Number	Designation			MODEL 212 with ENGINE 642 with CODE U42	MODEL 212 with ENGINE 642, 651 with CODE U77
BF14.40-P-1001-01A	AdBlue® tank	Initial fill capacity	Liter	25, 5	26
		Service fill capacity	Liter	24, 5	25, 5
		Specification		Approved NOx reducing agent ("AD Blue"). See https://bevo.mercedes-benz.com/index.php?language_id=1	Approved NOx reducing agent ("AD Blue"). See https://bevo.mercedes-benz.com/index.php?language_id=1

FILLING CAPACITY FOR BLUETEC DIESEL EXHAUST TREATMENT (SCR)

Number	Designation			MODEL 218 with ENGINE 642 with CODE U42	MODEL 218 with ENGINE 642, 651 with CODE U77
BF14.40-P-1001-01A	AdBlue® tank	Initial fill capacity	Liter	25, 5	26, 0
		Service fill capacity	Liter	24, 5	25, 5
		Specification		Approved NOx reducing agent ("AD Blue"). See https://bevo.mercedes-benz.com/index.php?language_id=1	Approved NOx reducing agent ("AD Blue"). See https://bevo.mercedes-benz.com/index.php?language_id=1

FILLING CAPACITY FOR BLUETEC DIESEL EXHAUST TREATMENT (SCR)

Number	Designation			MODEL 221 with ENGINE 642 with CODE U42
BF14.40-P-1001-01A	AdBlue® tank	Initial fill capacity	Liter	26, 0
		Service fill capacity	Liter	25, 0
		Specification		Approved NOx reducing agent ("AD Blue"). See https://bevo.mercedes-benz.com/index.php?language_id=1